MySQL Replication - 1 Master - 2 Slaves. Inserting works for One, not the other

I am a Python developer, working with 3 databases, configured in Master -> slave,slave style. Each slave has their own application associated with it. I am not too familiar with database administration as it relates to replication, but I do have a working scenario between the Master, and **one of the slaves** The first slave stays in synch at all times properly at this time. The second slave however, **fails on the first insert** Table creation queries, user creaiton all replicates fine, but when I input any values, **the first slave gets the record, while the second slave** does not. I tried importing the master DB to the second slave, updates to records will replicate, but new records will not. My research leads me to believe this is an issue with **autoincrement** but I have not been able to use this to fix the issue. As opposed to a hack and slash method which is not working I figured id ask here. If there is any more info I can provide, please let me know. I am on Windows. Using WAMP Server 2.5 (MySQL 5.6.17) Thanks for reading EDIT: I am using binlog_format=mixed